Documentation:Modules/image: Difference between revisions
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Trivia bit: the help-text was inaccurate; the code for the removed module shows a default of 0 |
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In VLC 1.0.0 the image video output was rewritten into a video-filter named [[Documentation:Modules/scene|scene]], and the old image video output was removed. | In VLC 1.0.0 the image video output was rewritten into a video-filter named [[Documentation:Modules/scene|scene]], and the old image video output was removed. | ||
Trivia bit: [https://git.videolan.org/?p=vlc/vlc-0.9.git;a=blob;f=modules/video_output/image.c#l56 the help text] was inaccurate, claiming width and height options were <samp>… [b]y default (-1) …</samp>. The variables that inherited the command-line options, <var>p_vout->p_sys->i_width</var> and <var>p_vout->p_sys->i_height</var>, were unsigned integers and the value <code>0</code> was passed as the second argument in [https://git.videolan.org/?p=vlc/vlc-0.9.git;a=blob;f=modules/video_output/image.c#l95 the call] to <code>[https://git.videolan.org/?p=vlc/vlc-0.9.git;a=blob;f=include/vlc_plugin.h;h=364e53c089d709d4a6eebc2756a973145d387d33;hb=HEAD#l354 add_integer]</code>.<br /> | |||
Thus, <code>--image-out-width</code> and <code>--image-out-height</code> had defaults of <code>0</code>, not <code>-1</code>.<br /> | |||
The help-text probably wasn't updated, since this error was prior to the first public release. It has since been fixed. | |||
{{Option | {{Option | ||
Revision as of 23:41, 4 April 2019
Options
Video output
| Module: image | |
|---|---|
| Type | Video output |
| First VLC version | 0.8.2 |
| Last VLC version | 0.9.10 |
| Operating system(s) | all |
| Description | Outputs the video images to files |
| Shortcut(s) | - |
In VLC 1.0.0 the image video output was rewritten into a video-filter named scene, and the old image video output was removed.
Trivia bit: the help text was inaccurate, claiming width and height options were … [b]y default (-1) …. The variables that inherited the command-line options, p_vout->p_sys->i_width and p_vout->p_sys->i_height, were unsigned integers and the value 0 was passed as the second argument in the call to add_integer.
Thus, --image-out-width and --image-out-height had defaults of 0, not -1.
The help-text probably wasn't updated, since this error was prior to the first public release. It has since been fixed.
- image-out-format <png, jpeg> : Format of the output images default value: png
- image-out-width <integer> : You can enforce the image width. By default -1 VLC will adapt to the video characteristics default value: -1
- image-out-height <integer> : You can enforce the image height. By default -1 VLC will adapt to the video characteristics default value: -1
- image-out-ratio <integer> : Ratio of images to record. 3 means that one image out of three is recorded default value: 3
- image-out-prefix <string> : Prefix of the output images filenames. Output filenames will have the "prefixNUMBER.format" form. Starting with VLC 0.9.0 you can also use format time and meta variables default value: img
- image-out-replace : Always write to the same file default value: disabled
Source code
This page is part of official VLC media player Documentation (User Guide • Streaming HowTo • Hacker Guide • Modules)
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